5
Half marathons in Gwynedd
Find half marathons near me in Gwynedd for 2025/2026 - filter by date or location, display on a map or use the advanced search to find your perfect race.
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- Sun 1 Mar 2026
- £44.99-£49.99
- Sun 1 Mar 2026
- £44.99-£49.99
Anglesey, Isle of Anglesey, UK
Jones o Gymru Anglesey Half Marathon
The 'UK's most beautiful Half Marathon'! Fast run flanked by breathtaking views of Snowdonia National Park and the Menai Straits. It's no wonder this race has become a firm favourite.
- Chip timing
- Enter online
- Undulating
- PB
- Age 17 & over
- 13.1 miles road running + 889 ft ascent
- Sun 7 Sep
Caernarfon, Gwynedd, UK
Caernarfon Half Marathon | Caernarfon Half Marathon
- 13.1 miles road running + 620 ft ascent
- Sun 5 Oct
Bangor, Gwynedd, UK
Bangor City 10K & Half Marathon | Half Marathon
- 13.1 miles road running
- Sun 9 Nov
Llanfairpwllgwyngyll, Isle of Anglesey, UK
Anglesey Trail Half Marathon & 10K | Half Marathon
- 21.1 km trail running + 544 ft ascent
- Sat 4 Apr 2026
Aberdyfi, Gwynedd, UK
Aberdyfi Half Marathon | Half Marathon
- 21.1 km trail running + 850 m ascent